ROAD NOTE METHOD NO.4, DOE AND HIGH STRENGTH PERFORMANCE OF
CONCRETE
MIX DESIGN
The process of selecting suitale ingre!ients of concrete an!
!etermining their relative "uantities
The purpose of pro!ucing an economical concrete #hich has
certain properties are
1$%or&aility'
BASIS OF THE METHOD
C!nt
The re"uire! "#C rati! to pro!uce the !esign
characteristic strength !epen!s upon the c$aracteristics !% t$e
ce&ent
y using same "#C rati!' !i-erent strengths are pro!uce! y
r!inary 2ortlan!' Rapi! har!ening 2ortlan! an! igh alumina
cements$
C!nt
+ rough in!ication of the e(ree !% )!r*a+ilit is otaine! y the
correspon!ing sl-&' an! c!&'actin( %act!r of the
concrete at the #or& site ,tensive 5aoratory
investigations #ere con!ucte! at the ROAD RESEARCH
ABORATOR/ to stu!y the relation among the various
parameters such as
1$+ggregate7ement Ratio
4$8ra!ing
MIX DESIGN PROCED0RE
8er (!! control #ith #eigh atching$ C!nstant S-'ervisi!n
=
60
P!!r control' inaccurate volume atching of all in aggregates
N! s-'ervisi!n
40
STEP 93 "ATER CEMENT RATIO
• The %7 ratio is re"uire! to give the necessary average
compressive strength' at the !esire! age an! for the type of cement
use!$
STEP ; 3 AGREGATE CEMENT RATIO "ITH DEGREE OF "OR<ABIIT/ AND
GRADING OF C0R8E
• The proportion of
comine aggregate to cement is
!etermine! from Tale 3 > 4 for aggregates of ma,imum si:e
40
an! (0mm respectively$
+ggregate availale at the #or& site !i-er
from the stan!ar! gra!ing' the coarse an! ;ne
STEP =3 PROPORTION OF CEMENT, "ATER, FINE AND COARSE
AGGREGATES
CEMENT 3 FINE AGGREGATE 3 COARSE AGGREGATE 3 "ATER
1 Nf Nc #
IMITATIONS OF ROAD NOTE NO.4 METHOD
)esign tales of aggregate 7ement ratio recommen!e! in Roa! Note
No$4 cover only three shapes of aggregates an! four type
gra!ings
ut in practice aggregates having !i-erent shapes' si:es an!
properties have to use for the mi,es$
This metho! cannot e use! !irectly for the !esign of air
entraine! concrete
ence the proportions y #eight of ingre!ients are given y
CEMENT 3 FINE AGGREGATE 3 COARSE AGGREGATE
1 J 4$E,40 J 4$E,60
100 100
PROPORTION B/ 8O0ME
16E0 1(0
T$en + a+s!l-te v!l-&e &et$!, )e $ave
7 K 1$9(7 K ($EE7 K 0$6( 7 H 1m3 3$1,103 ($6,103 ($6,103 103
C@;== *(